Which of the following complex compounds/ions | vedclass

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Question

(C) The $EAN$ (Effective Atomic Number) rule states that a complex is stable if the total number of electrons around the central metal atom equals the

Vedclass · Accepted Answer

$[Fe(CO)_5]$

Vedclass · Answer

(C) The $EAN$ (Effective Atomic Number) rule states that a complex is stable if the total number of electrons around the central metal atom equals the atomic number of the next noble gas.For $[Fe(CO)_5]$:Atomic number of $Fe = 26$.Oxidation state of $Fe = 0$.Number of electrons donated by $5$ $CO$ ligands $= 5 	imes 2 = 10$.$EAN = 26 - 0 + 10 = 36$.Since $36$ is the atomic number of $Krypton$ $(Kr)$,$[Fe(CO)_5]$ obeys the $EAN$ rule.

Which of the following complex compounds/ions obeys the Sidgwick $EAN$ rule?

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